Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: LSATCA11DS0

Remotes:

Switch Switch name Switch type
MSBHCA11RS2  MOSS BEACH  5ER 
PSCDCA11RS1  PESCADERO  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-559 A Los Altos CA 9740 PACIFIC BELL 722      
650-917 A Los Altos CA 9740 PACIFIC BELL 722      
650-941 A Los Altos CA 9740 PACIFIC BELL 722      
650-947 A Los Altos CA 9740 PACIFIC BELL 722      
650-948 A Los Altos CA 9740 PACIFIC BELL 722      
650-949 A Los Altos CA 9740 PACIFIC BELL 722      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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